The Accuphase C-3900S is the flagship preamplifier, succeeding the C-3900, featuring significant improvements in S/N ratio and distortion characteristics.

Incorporates the advanced "Dual Balanced AAVA" technology, ensuring reduced noise and enhanced sound quality through eight AAVA circuits per channel.

Boasts a robust design with independent toroidal transformers, twelve 10,000μF filter capacitors, and a high-precision ANCC IV conversion amplifier.